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地震是一种突发性的自然灾害。其危害之大,影响之广在各种自然灾害中是无以伦比的,如1976年在我国唐山发生的7.8级大地震,便整个唐山市变成一片废墟,死亡人数达24万多。1923年日本关东发生8.3级大地震,经济损失达300多亿美元。1960年智利发生8.9级大地震,所造成的地面形态的变化非常显著,海啸规模空前巨大,破坏性之大是世界上罕见的,因而人们谈震色变。 地震对人类的危害很大,而目前人类对地震尚处于
Earthquakes are a sudden natural disaster. Its great harm and wide impact are unparalleled in various natural disasters. For example, in 1976, a magnitude 7.8 earthquake occurred in Tangshan, China, and the entire Tangshan city became a ruin, with more than 240,000 deaths. In 1923, a 8.3-magnitude earthquake occurred in Kanto, Japan, and the economic loss amounted to more than 30 billion U.S. dollars. The 8.9-magnitude earthquake in Chile in 1960 caused a significant change in the shape of the ground. The tsunami scale was unprecedentedly large and the destructive nature was rare in the world, so people talked about the earthquake. Earthquakes pose a great hazard to humans, but humans are still